]*>","")" /> Two-stage Hydrolysis of Invasive Algal Feedstock for Ethanol Fermentation

J Integr Plant Biol ›› 2011, Vol. 53 ›› Issue (3): 246-252.DOI: 10.1111/j.1744-7909.2010.01024.x

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Two-stage Hydrolysis of Invasive Algal Feedstock for Ethanol Fermentation

Xin Wang1, Xianhua Liu2 and Guangyi Wang1,3**   

  • 收稿日期:2010-12-08 接受日期:2010-12-12 出版日期:2011-03-01 发布日期:2010-12-17

Two-stage Hydrolysis of Invasive Algal Feedstock for Ethanol Fermentation

Xin Wang1, Xianhua Liu2 and Guangyi Wang1,3**   

  1. 1Department of Oceanography, University of Hawaii at Manoa, HI 96822, USA
    2School of Environmental Science and Engineering, Tianjin University, Tianjin 300071, China
    3School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
  • Received:2010-12-08 Accepted:2010-12-12 Online:2011-03-01 Published:2010-12-17
  • About author:**Corresponding author Tel: +1 808 956 3744, +86 755 2661 1617; Fax: +1 808 956 9225, +86 0755 2603 5227; E-mail: guangyi@hawaii.edu, gywang@pkusz.edu.cn

被引次数

56

Abstract:

The overall goal of this work was to develop a saccharification method for the production of third generation biofuel (i.e. bioethanol) using feedstock of the invasive marine macroalga Gracilaria salicornia. Under optimum conditions (120 °C and 2% sulfuric acid for 30 min), dilute acid hydrolysis of the homogenized invasive plants yielded a low concentration of glucose (4.1 mM or 4.3 g glucose/kg fresh algal biomass). However, two-stage hydrolysis of the homogenates (combination of dilute acid hydrolysis with enzymatic hydrolysis) produced 13.8 g of glucose from one kilogram of fresh algal feedstock. Batch fermentation analysis produced 79.1 g EtOH from one kilogram of dried invasive algal feedstock using the ethanologenic strain Escherichia coli KO11. Furthermore, ethanol production kinetics indicated that the invasive algal feedstock contained different types of sugar, including C5-sugar. This study represents the first report on third generation biofuel production from invasive macroalgae, suggesting that there is great potential for the production of renewable energy using marine invasive biomass.

Wang X, Liu X, Wang G (2011) Two-stage hydrolysis of invasive algal feedstock for ethanol fermentation. J. Integr. Plant Biol. 53(3), 246–252.

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